Android 4.2 is barely and the bugs are starting to come out of the woodwork. Amongst the bug fest that is Android 4.2 is random reboots, general device instability, battery drain and slow charging and odd behaviour on the lockscreen. The best one is affected android devices “loosing” december. Yup a whole month
Battery issues seem to be down to cloud player, google currents seems to have an impact on making your device slower with people recommending you turn off background synching to get some performance back.
Another thing I’ve noticed is that the Apple fans don’t seem to be jumping into these forums and causing upset with these issues. If Apple had released iOS you’d bet there would be uproar.
For the full rundown on Android 4.2 bugs head to androidpolice.com